Settling device and graphene dispersing equipment

Abstract

The utility model discloses a sedimentation device and graphene dispersion equipment. Wherein the graphene dispersing equipment consists of a pre-dispersing device, a filtering device, a settling device, an isolate treating device and a finished product collecting device. The filtering device is connected with the settling device to form a first loop for material circulation; and the second loop is connected with the separated substance treatment device to form material circulation. The sedimentation device comprises a sedimentation reaction container, a settling feed port, a settling port and a finished product discharge port are formed in the settling reaction container, and the settling feed port is connected with an annular pipeline arranged in the inner space of the settling reaction container; the tail end of the annular pipeline is provided with a forked structure comprising a material collecting pipe and a material return pipe; the material collecting pipe extends from the inner side of the annular pipeline; the material return pipe is an extension outside the annular pipeline, and the other end of the material return pipe is connected with the settling port and extends to the bottom of the settling reaction container. The annular pipeline accelerates the materials to generate centrifugal force, graphene with different layer numbers is subjected to different resistances, separation is achieved, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a production device for lubricating products, in particular to a sedimentation device and a graphene dispersion device, belonging to the technical field of graphene lubricating product production. Background Art

[0002] Lubricating oil is a liquid lubricant applied to various types of machinery to reduce friction and protect machinery and workpieces. The application of lubricating oil can not only reduce wear to extend the service life of machinery, but also play roles such as cleaning the scale on the friction surface, dispersing stress and buffering, cooling, sealing, rust prevention, and kinetic energy transmission.

[0003] Graphene is an inorganic material with self-lubricating properties. On the one hand, due to its lamellar structure, the van der Waals force between the lamellae is a relatively weak force. Compared with other two-dimensional materials, it is easier to achieve sliding between the lamellae, thus improving the lubrication performance. On the other hand, since the thickness of the graphene lamellae is only 0.35 nm, it is easy to enter the friction surface and form a lubricating film on the rough friction surface, and even repair the rough friction surface, thereby further improving the lubrication performance. The lubricating oil added with graphene can effectively repair scratches on the cylinder surface, reduce engine vibration noise, reduce oil consumption, reduce harmful gas emissions, save energy and protect the environment, have stable structure, good sealing performance, and can increase the cylinder pressure. The graphene lubricating oil produced by the existing production equipment will show precipitation and other phenomena after long-term static placement. This precipitation is mainly because there are some graphene sheets with larger diameters or more layers, which will affect the dispersion stability of graphene in the lubricating oil. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a sedimentation device and a graphene dispersion device, so as to overcome the deficiencies in the prior art.

[0005] To achieve the foregoing utility model purpose, the technical solutions adopted by the utility model include:

[0006] In the first aspect of the embodiment of the utility model, a sedimentation device is provided, including a sedimentation reaction container; a sedimentation feed inlet, a sedimentation outlet, and a finished product discharge outlet are arranged on the sedimentation reaction container. The sedimentation feed inlet is connected to an annular pipeline arranged inside the sedimentation reaction container for inputting materials; the finished product discharge outlet is used for outputting the dispersed materials; the end of the annular pipeline has a bifurcated structure, and the bifurcated structure includes a material collection pipe and a material return pipe; the material collection pipe is an extension of the inner side of the annular pipeline for outputting the dispersed materials; the material return pipe is an extension of the outer side of the annular pipeline, and the other end of the material return pipe is connected to the sedimentation outlet and extends to the bottom of the sedimentation reaction container.

[0007] Further, the sedimentation reaction vessel is a conical sedimentation tank, the sedimentation port is connected to a sedimentation return pipe, and the finished product discharge port is connected to a finished product discharge pipe;

[0008] A sedimentation control valve and a sedimentation pressure pump are provided on the sedimentation return pipe;

[0009] An outlet control valve and an outlet pressure pump are provided on the finished product discharge pipe.

[0010] A second aspect of the embodiment of the present invention provides a graphene dispersion device, including a filtration device, a sedimentation device, and a separation treatment device;

[0011] The filtration device is connected to the sedimentation device to form a first loop for the circulation of materials, and the filtration device is connected to the separation treatment device to form a second loop for the circulation of materials. The filtration device is used for filtering materials, the sedimentation device is used for sedimenting the filtrate output by the filtration device, and collecting the upper-layer lubricating oil after sedimentation. The separation treatment device is used for homogenizing the filter residue output by the filtration device and collecting the solid matter after homogenization treatment.

[0012] Further, the filtration device includes n filters, where n≥2;

[0013] The filter includes a filter body and a feed pipe, a discharge pipe, and a filter residue pipe connected to the filter body. The interior of the filter body has a working chamber, and a filter element is arranged in the working chamber. The filter element divides the working chamber into a first chamber and a second chamber, and the second chamber is arranged in the first chamber;

[0014] The filter residue pipe is connected to the first chamber; the discharge pipe is connected to the second chamber; the filter body is provided with a reversing multi-way valve. When the reversing multi-way valve is adjusted to the first flow direction, the feed pipe is connected to the first chamber. When the reversing multi-way valve is adjusted to the second flow direction, the feed pipe is connected to the second chamber;

[0015] Among them, the feed pipe of the second filter is connected to the discharge pipe of the first filter, the filter residue pipe of the second filter is connected to the feed pipe of the first filter, and the discharge pipe of the second filter is connected to the feed pipe of the third filter;... the feed pipe of the mth filter is connected to the discharge pipe of the (m - 1)th filter, the discharge pipe of the mth filter is connected to the feed pipe of the (m + 1)th filter, and the filter residue pipe in the mth filter is connected to the feed pipe of the (m - 1)th filter;... the feed pipe of the nth filter is connected to the discharge pipe of the (n - 1)th filter, and the filter residue pipe of the nth filter is connected to the feed pipe of the (n - 1)th filter;

[0016] The feed pipe of the first filter is used to input the material before filtration, the filtrate pipe of the first filter is used to output the filtrate obtained after filtration, and the discharge pipe of the nth filter is used to output the material after filtration, where 2 ≤ m ≤ n.

[0017] Further, the pore diameters and / or porosities of the filter elements included in at least two of the n filters are different;

[0018] The pore diameter of the filter elements of the n filters increases gradually from the first filter to the nth filter;

[0019] The feed pipe of the mth filter, the discharge pipe of the (m - 1)th filter, and the filtrate pipe of the (m + 1)th filter are connected by a three-way valve.

[0020] Further, the sedimentation return pipe is connected to the feed pipe of the nth filter; the discharge pipe of the nth filter is connected to the sedimentation device; the separation treatment device is connected with a filtration return pipe; the filtration return pipe is connected to the feed pipe of the first filter; the filtrate pipe of the first filter is connected to the separation treatment device; the discharge pipe of the nth filter is connected to the annular pipeline, and the sedimentation return pipe is connected to the feed pipe of the nth filter.

[0021] Further, the separation treatment device includes a stirring assembly; the stirring assembly includes an intermediate tank and a stirring member; the stirring member extends into the inner space of the intermediate tank; the filtrate pipe of the first filter is connected to the intermediate tank; the intermediate tank is provided with the filtration return pipe for transporting the stirred material to the feed pipe of the first filter;

[0022] The stirring member is a stirrer;

[0023] The filtration return pipe is provided with an intermediate tank control valve and an intermediate tank pressure pump;

[0024] The filtrate pipe of the first filter is provided with a valve.

[0025] Further, the separation treatment device further includes a centrifugation assembly; the centrifugation assembly is connected with a centrifugation feed pipe and a first return pipe; the centrifugation feed pipe is connected to the filtration return pipe through a three-way valve; the first return pipe is connected to the intermediate tank;

[0026] The centrifugation assembly is a centrifuge;

[0027] The separation treatment device further includes a homogenization assembly; the centrifugation assembly is further connected with a centrifugation discharge pipe; the centrifugation discharge pipe is connected to the homogenization assembly; the homogenization assembly is connected with a second return pipe; the second return pipe is connected to the intermediate tank;

[0028] The homogenizing assembly includes a feed tank and a high-speed homogenizer; the centrifugal discharge pipe is connected to the feed tank; the feed tank is connected to the high-speed homogenizer; the second return pipe is arranged on the high-speed homogenizer.

[0029] Furthermore, a pre-dispersion device is further included. The pre-dispersion device includes a blending device and a grinding device; the blending device is connected to the grinding device to form a third loop for the circulation of materials, the blending device is used for blending materials; the grinding device is used for grinding materials.

[0030] The blending device includes a blending container; the blending container is connected with a blending feed pipe and a blending discharge pipe; the blending feed pipe is used for transporting raw materials to the blending container; the blending discharge pipe is connected to the feed pipe of the first filter for transporting the blended materials to the first filter.

[0031] The blending container is a blending tank.

[0032] A blending tank control valve and a blending pressure pump are arranged on the blending discharge pipe.

[0033] The blending tank includes an upper and a lower structure, which are connected by a narrow opening in the middle.

[0034] The upper and lower sections are conical structures.

[0035] A sandwich layer is arranged at the narrow opening of the blending tank.

[0036] A conductive liquid is filled inside the sandwich layer.

[0037] The conductive liquid is heat-conducting oil.

[0038] The sandwich layer is externally connected to a mold temperature controller.

[0039] Furthermore, the grinding device includes a grinding container; the grinding container is connected with a grinding feed pipe and a grinding discharge pipe; the grinding feed pipe is connected to the blending discharge pipe through a three-way valve; the grinding discharge pipe is connected to the blending container.

[0040] Compared with the prior art, the advantages of the present utility model include:

[0041] For a graphene dispersion device provided by the present utility model, in the pre-dispersion device, the materials are circulated and ground between the grinding pump and the blending tank through the blending tank control valve and the second three-way valve, so that the oil is ground more fully, effectively opening the soft agglomerates of graphene and improving the dispersion stability of graphene in the lubricating oil; the blending tank is of an upper and lower two-section type, connected by a narrow opening in the middle, which can make the materials that have not been processed by the grinding pump in the previous round enter the grinding pump as much as possible, and at the same time, stirring can be omitted, improving the grinding efficiency.

[0042] A graphene dispersion device provided by the present utility model, a filtering device. By setting filters with different filter element pore diameters, the part of graphene with a relatively large sheet diameter can be intercepted, and the filter element can be prevented from being blocked; at the same time, this intercepted part of graphene can be collected through backwashing.

[0043] A graphene dispersion device provided by the present utility model, a sedimentation device. By accelerating the material through an annular pipeline to generate centrifugal force, and taking advantage of the different resistances received by graphene with different numbers of sheet layers, the separation of graphene with different numbers of sheet layers is achieved. The material containing graphene with a relatively large number of sheet layers is directly transported to the bottom of the sedimentation tank, which can minimize its disturbance to the sedimentation state of the material in the sedimentation tank. The material containing graphene with a relatively small number of sheet layers is directly transported from the sedimentation tank to the finished product tank, improving the separation efficiency of graphene with different numbers of sheet layers; in addition, the sedimentation tank is designed as a cone to improve the sedimentation efficiency.

[0044] A graphene dispersion device provided by the present utility model is concentrated by a centrifuge, and a high-pressure homogenizer further thins and reduces the size of the part of graphene with a relatively large number of sheet layers or a relatively large sheet diameter, improving the dispersion stability of graphene in lubricating oil. Description of the Drawings

[0045] Figure 1 is a schematic structural diagram of a graphene dispersion device provided in a typical embodiment of the present utility model;

[0046] Figure 2 is a schematic structural diagram of the filter element of the filter provided in a typical embodiment of the present utility model;

[0047] Figure 3 is a schematic structural diagram of the sedimentation tank provided in a typical embodiment of the present utility model;

[0048] Figure 4 is a schematic structural diagram of the annular pipeline provided in a typical embodiment of the present utility model;

[0049] Figure 5 is a schematic structural diagram of the backflow of the filter element of the filter provided in a typical embodiment of the present utility model.

[0050] Description of the Reference Numerals:

[0051] 100 - Predispersion device; 1 - Feed inlet of the blending tank; 2 - Blending tank; 3 - Interlayer; 4 - Discharge outlet of the blending tank; 5 - Control valve of the blending tank; 6 - Feed inlet of the grinding pump; 7 - Discharge outlet of the grinding pump; 8 - Grinding pump; 9 - Second three-way valve; 10 - Return port of the blending tank; 11 - Grinding control valve;

[0052] 200 - Filtering device; 12 - First filtering three - way valve; 13 - First filtering feed inlet; 14 - First filtering discharge outlet; 15 - First filter; 16 - First filter element; 17 - Second filtering three - way valve; 18 - Second filtering feed inlet; 19 - Second filtering discharge outlet; 20 - Second filter; 21 - Second filter element; 22 - Third filtering three - way valve; 23 - Third filtering feed inlet; 24 - Third filtering discharge outlet; 25 - Third filter; 26 - Third filter element; 27 - Blending pressure pump;

[0053] 300 - Settling device; 28 - Settling feed inlet; 29 - Annular pipeline; 30 - Annular pipeline discharge outlet; 31 - Settling tank; 32 - Settling discharge outlet; 33 - Settling opening; 34 - Settling control valve; 35 - Settling pressure pump; 36 - Third filter outlet valve; 37 - Second filter outlet valve; 38 - First filter outlet valve;

[0054] 39 - Stirring feed inlet; 40 - Stirrer; 41 - Intermediate tank; 42 - Stirring discharge outlet; 43 - Intermediate tank control valve; 44 - Intermediate tank pressure pump; 45 - First three - way valve;

[0055] 400 - Separation treatment device; 500 - Finished product collection device; 46 - Centrifugal feed inlet; 47 - Centrifuge; 48 - Second centrifugal discharge outlet; 49 - Feed tank; 50 - High - pressure homogenizer; 51 - Homogenization discharge outlet; 52 - Second return port; 53 - First centrifugal discharge outlet; 54 - First return port; 55 - Stirring control valve; 56 - Discharge control valve; 57 - First feed inlet; 58 - Discharge pressure pump; 59 - Second feed inlet; 60 - Finished product tank; 61 - First pressure gauge; 62 - Second pressure gauge; 63 - Third pressure gauge. Detailed implementation manners

[0056] In view of the deficiencies in the prior art, through long - term research and a large number of practices by the inventors of this case, the technical solution of the present utility model can be proposed. The following will further explain the technical solution, its implementation process, principles, etc.

[0057] Please refer to Figure 1 , which is a schematic structural diagram of a graphene dispersion device provided by an embodiment of the present utility model.

[0058] A graphene dispersion device includes: a pre - dispersion device 100, a filtering device 200, a settling device 300, a separation treatment device 400, and a finished product collection device 500. The finished product collection device includes a finished product tank 60.

[0059] First, introduce the specific structure and material processing process of the pre - dispersion device:

[0060] The pre-dispersion device 100 includes a blending device and a grinding device. The blending device includes a blending tank 2; a blending tank feed port 1 is provided on the blending tank 2. The blending tank 2 is connected with a blending feed pipe and a blending discharge pipe; the blending feed pipe is used for conveying raw materials to the blending tank 2; the blending discharge pipe is connected to a filtering device and is used for conveying the blended materials to the filtering device. A blending tank control valve 5 and a blending pressure pump 27 are provided on the blending discharge pipe; the blending tank 2 includes an upper and a lower section structure, which are connected through a narrow opening in the middle; the upper and lower sections are of a conical structure; a sandwich layer 3 is provided at the narrow opening of the blending tank 2; heat-conducting oil is filled inside the sandwich layer 3; the sandwich layer 3 is externally connected to a mold temperature controller.

[0061] The grinding device includes a grinding pump 8; the grinding pump 8 is connected with a grinding feed pipe and a grinding discharge pipe; the grinding feed pipe is connected to the blending discharge pipe through a second three-way valve 9; the grinding discharge pipe is connected to the blending tank 2. The material circulates between the grinding device and the blending device.

[0062] Specifically, first, prepare the materials and feed the materials into the blending tank 2 from the blending tank feed port 1. Then, start the mold temperature controller. Control the temperature of the heat-conducting oil in the sandwich layer 3 through the mold temperature controller, so as to raise or lower the temperature of the raw materials. The temperature of the heat-conducting oil depends on the specific materials. The blending device also includes a blending tank control valve 5. Open the blending tank control valve 5, and the blended materials flow out from the blending tank discharge port 4.

[0063] In order to further reduce the sheet diameter of graphene in the materials, after the temperature is raised or lowered, open the blending tank control valve 5. The second three-way valve 9 connects the blending tank discharge port 4 and the grinding pump feed port 6. The materials pass through the blending tank discharge port 4 and the grinding pump feed port 6, enter and start the grinding pump 8. The grinding pump 8 here can grind the graphene sheets with large sheet diameters or large numbers of sheet layers in the materials into graphene sheets with smaller sheet diameters or smaller numbers of sheet layers. After one grinding, the materials pass through the grinding pump discharge port 7 to the blending tank return port 10, and finally return to the blending tank 2 to achieve circulation. The number of circulation times can be set according to the size degree of the sheet diameter of graphene. It can be understood that the blending tank is in an upper and lower two-section type, connected through a narrow opening in the middle, which can make the materials that have not been processed by the grinding pump in the previous round enter the grinding pump as much as possible, and stirring can be omitted at the same time.

[0064] After circulating for a certain period of time, graphene can be dispersed into a non-agglomerated state as much as possible, but there may still be an insufficient grinding situation. Next, introduce the structure of the filtering device in the present invention and the material filtering process:

[0065] In a specific embodiment of the present invention, the filtering device includes three filters arranged along the material conveying direction, namely a first filter 15, a second filter 20, and a third filter 25.

[0066] The first filter 15 is provided with a first filtration feed inlet 13 connected to the feed pipe, a first filtration discharge outlet 14 connected to the discharge pipe, and a first filtrate outlet connected to the filtrate pipe. A first filtration three-way valve 12 is provided on the feed pipe of the first filter 15. A first pressure gauge 61 is also provided on the first filter 15. A first filter element 16 is disposed inside the first filter 15, and the first filter element 16 divides the working chamber of the first filter 15 into a first chamber and a second chamber; the second chamber is disposed inside the first chamber.

[0067] The second filter 20 is provided with a second filtration feed inlet 18 connected to the feed pipe, a second filtration discharge outlet 19 connected to the discharge pipe, and a second filtrate outlet connected to the filtrate pipe. A second filtration three-way valve 17 is provided on the feed pipe of the second filter 20. A second pressure gauge 62 is also provided on the second filter 20. A second filter element 21 is disposed inside the second filter 20.

[0068] The third filter 25 is provided with a third filtration feed inlet 23 connected to the feed pipe, a third filtration discharge outlet 24 connected to the discharge pipe, and a third filtrate outlet connected to the filtrate pipe. A third filtration three-way valve 22 is provided on the feed pipe of the third filter 25. A third pressure gauge 63 is also provided on the third filter 25. A third filter element 26 is disposed inside the third filter 25.

[0069] Among them, the feed pipe of the first filter 15 is used to transfer materials to the first filter 15, and the discharge pipe of the first filter 15 is connected to the feed pipe of the second filter 20; the filtrate pipe of the first filter is used to output the intercepted materials. The feed pipe of the second filter 20 is connected to the discharge pipe of the first filter 15, the discharge pipe of the second filter 20 is connected to the feed pipe of the third filter 25, and the filtrate pipe in the second filter 20 is connected to the feed pipe of the first filter 15. The feed pipe of the third filter 25 is connected to the discharge pipe of the second filter 20, the filtrate pipe of the third filter 25 is connected to the feed pipe of the second filter 20; the discharge pipe of the third filter 25 is used to output the filtered materials.

[0070] Specifically, in order to further reduce the sheet diameter of graphene in the material, after the cyclic grinding is completed, the second three-way valve 9 and the first filtration three-way valve 12 are both connected to the discharge outlet 4 of the blending tank and the first filtration feed inlet 13, the second filtration three-way valve 17 is connected to the first filtration discharge outlet 14 and the second filtration feed inlet 18, the third filtration three-way valve 22 is connected to the second filtration discharge outlet 19 and the third filtration feed inlet 23, and the blending tank control valve 5, the blending pressure pump 27, and the grinding control valve 11 are opened, the first filtrate outlet valve 38, the second filtrate outlet valve 37, the third filtrate outlet valve 36, and the sedimentation control valve 34 are closed, and the blending pressure pump 27 is started. At this time, the material passes through the discharge outlet 4 of the blending tank and the first filtration feed inlet 13 and enters the first filter 15. For the specific filtration process, please refer to Figure 2 .

[0071] The first filter 15, the second filter 20, and the third filter 25 are provided with a reversing multi-way valve. When the reversing multi-way valve is adjusted to the first flow direction, the feed pipes of the first filter 15, the second filter 20, and the third filter 25 are connected to the first chamber. When the first filter outlet valve 38, the second filter outlet valve 37, and the third filter outlet valve 36 are closed, the material enters the outside of the first filter element 16 from the first filtration feed port 13, is filtered by the first filter element 16, and flows out from the first filtration discharge port 14. Then, the material enters the outside of the second filter element 21 from the second filtration feed port 18, is filtered by the second filter element 21, and flows out from the second filtration discharge port 19. Then, the material enters the outside of the third filter element 26 from the third filtration feed port 23, is filtered by the third filter element 26, and flows out from the third filtration discharge port 24. At this time, graphene with a larger particle size is intercepted at the bottoms of the first filter 15, the second filter 20, and the third filter 25, and the outer surfaces of the first filter element 16, the second filter element 21, and the third filter element 26 also contain intercepted graphene.

[0072] The first filter 15 here is a pre-filter, a common purification device for municipal tap water, which is a primary filter with a relatively large pore size. In the present invention, the pore sizes of the filter elements of the first filter 15, the second filter 20, and the third filter 25 decrease in sequence. Under three-stage filtration, graphene with a relatively large particle size in the material can be filtered out for further treatment. The number of filters here is not limited to three and can be set according to specific circumstances. By setting the decreasing pore sizes of the filter elements, the filter elements can be prevented from being blocked while ensuring the interception of graphene. The material of the filter element can be stainless steel or the like, which is not limited herein.

[0073] After three-stage filtration, as much as possible, graphene with a relatively large particle size can be filtered and retained in the filter. However, the particle size of the filtered material is not small enough, and the dispersion stability of graphene in the material is not high enough. In order to further refine the material flowing out from the third filtration discharge port 24, next, the structure of the sedimentation device in the present invention and the material sedimentation process are introduced.

[0074] The sedimentation device includes a sedimentation tank 31. The bottom of the sedimentation tank 31 is conical. An annular pipeline 29 is arranged in the inner space of the sedimentation tank 31; the discharge pipe of the third filter 25 is connected to the annular pipeline 29; a sedimentation return pipe and a finished product discharge pipe are arranged on the sedimentation tank 31. A sedimentation control valve 34 and a sedimentation pressure pump 35 are arranged on the sedimentation return pipe. A discharge control valve 56 and a discharge pressure pump 58 are arranged on the finished product discharge pipe. The end of the annular pipeline 29 has a bifurcated structure, and the bifurcated structure includes a material collection pipe and a material return pipe; the material collection pipe is an extension of the inner side of the annular pipeline and extends outside the sedimentation tank 31 for outputting the dispersed material to a finished product tank 60; the material return pipe is an extension of the outer side of the annular pipeline, and the other end of the material return pipe is connected to a sedimentation port and extends to the bottom of the sedimentation reaction vessel.

[0075] Specifically, open the discharge control valve 56 and the discharge pressure pump 58, and the material enters the sedimentation tank 31 through the annular pipeline, slowly rises in the sedimentation tank 31, and enters the finished product tank 60; when the pressure gauge of any one of the three filters exceeds the preset value, when the three-way valve on the feed pipe conducts the feed pipe and the filtrate pipe, open the sedimentation control valve 34 and the sedimentation pressure pump 35, and the material is output from the sedimentation discharge pipe to the filter, then enters the separation material treatment device, and enters the filter through the filtered material discharge pipe.

[0076] Specifically, please refer to Figure 3 , 4 . After three-stage filtration, graphene with a particle diameter larger than the filter control size is intercepted, and graphene with a particle diameter smaller than the filter control size is output from the third filtration discharge port 24 and enters the annular pipeline 29 through the sedimentation feed port 28. The material is pumped into the annular pipeline and continuously accelerates in the annular pipeline. The part of the material with more graphene sheet layers moves faster, and separation can be achieved. The smaller the particle diameter of graphene, the fewer the number of sheet layers. In order to separately collect graphene with different numbers of sheet layers, two discharge ports are arranged at the discharge port 30 of the annular pipeline: an outer pipeline outlet and an inner pipeline outlet. After different sheet layers of graphene are accelerated by the annular pipeline 29, graphene with more sheet layers enters the sedimentation tank 31 through the outer pipeline outlet of the annular pipeline discharge port 30 through the material return pipe, and graphene with fewer sheet layers passes through the material collection pipe from the inner pipeline outlet of the annular pipeline discharge port 30 and enters the finished product tank 60 through the first feed port 57.

[0077] The principle of the sedimentation tank 31 in the present utility model is as follows:

[0078] The graphene-containing material moves in a circular pipeline. The graphene is subjected to centrifugal force. The graphene with more layers of flakes is less resistant and moves faster, tending to the outer side of the circular pipeline, while the graphene with fewer layers of flakes is more resistant and tends to the inner side of the circular pipeline. There is a bifurcated structure at the end of the circular pipeline. The material return pipe is an extension of the outer side of the circular pipeline, and the material collection pipe is an extension of the inner side of the circular pipeline, thus realizing the separation of graphene with more layers of flakes and graphene with fewer layers of flakes.

[0079] Graphene with more layers is the main component of the sediment in graphene lubricant products. Discharging the material containing graphene with more layers from the bottom of the sedimentation tank can minimize the disturbance to the sedimentation state of the material in the sedimentation tank. After further sedimentation, the upper layer of the sedimentation tank is the material containing graphene with fewer layers and better dispersion stability. Preferably, the lower section of the sedimentation tank 31 is set as a cone, which can accelerate sedimentation, making the graphene with more layers tend to the lower layer of the tank body, and the graphene with fewer layers tend to the upper layer of the tank body, while facilitating the collection of graphene with more layers. It can be understood that the graphene with fewer layers in the upper layer of the sedimentation tank 31 can enter the finished product tank 60 through the sedimentation discharge port 32. Specifically, open the discharge control valve 56 and the discharge pressure pump 58. After sedimentation, the material containing graphene with smaller flake diameters and fewer layers in the sedimentation tank enters the finished product tank 60 through the sedimentation discharge port 32 and the second feed port 59. It should be noted that this collection process does not interfere with processes such as filtration and sedimentation.

[0080] It can be understood that as the filtration time increases, more graphene is intercepted, and the pressure gauge reading on the filter becomes larger. Therefore, it is necessary to process the sedimented material in the sedimentation tank and the intercepted material in the filter. The following describes how to transport the sedimented material in the sedimentation tank and the intercepted material in the filter to the separation material treatment device for processing.

[0081] When the value of any one of the first pressure gauge 61, the second pressure gauge 62, and the third pressure gauge 63 exceeds the preset value, connect the first filtration three-way valve 12 to the first filtration feed port 13 and the second filter outlet valve 37, connect the second filtration three-way valve 17 to the second filtration feed port 18 and the third filter outlet valve 36, connect the third filtration three-way valve 22 to the third filtration feed port 23 and the sedimentation control valve 34, and open the first filter outlet valve 38, the second filter outlet valve 37, the third filter outlet valve 36, and the sedimentation control valve 34, close the intermediate tank control valve 43, and turn on the blending pressure pump 27. The material that has not entered the finished product tank 60 is output from the sedimentation port 33, and in the order of n to 1, it passes through n filters in sequence, and enters the intermediate tank 41 through the first filter outlet valve 38 and the stirring feed port 39.

[0082] When the reversing multi-way valves of the first filter 15 , the second filter 20 , and the third filter 25 are adjusted to the second flow direction, the feed pipes of the first filter 15 , the second filter 20 , and the third filter 25 are connected to the second chamber.

[0083] When the intercepted material needs to be flushed, the water flow is reversed by manually or automatically adjusting the reversal multi-way valves of the first filter 15, the second filter 20, and the third filter 25, so that the raw water flows from the clean water side of the filter element to the raw water side, thereby achieving the purpose of backwashing. Specifically, the working state of the filter is external pressure type, which flushes out the impurities embedded in the mesh of the filter element, and eliminates the primary pollution caused by the accumulation of impurities.

[0084] Please see Figure 5 Specifically, the lower layer of the sedimentation tank 31 contains materials with a large number of graphene sheets. The materials in the lower layer of the sedimentation tank 31 flow out from the sedimentation port 33, enter the internal space of the third filter element 26 through the third filter three-way valve 22, and flush the filtrate trapped between the outer side of the third filter element 26 and the inner wall of the third filter 25. Then, through the third filter outlet valve 36 and the second filter three-way valve 17, enter the internal space of the second filter element 21, and flush the filtrate trapped between the outer side of the second filter element 21 and the inner wall of the second filter 20. Then, through the second filter outlet valve 37 and the first filter three-way valve 12, enter the internal space of the first filter element 16, and flush the filtrate trapped between the outer side of the first filter element 16 and the inner wall of the first filter 15. Finally, the material enters the intermediate tank 41 through the first filter outlet valve 38 and the stirring feed port 39. At this time, the material in the intermediate tank 41 is the part of the graphene in the original material with a larger sheet diameter and a larger number of sheets.

[0085] In order to further process the graphene flakes with larger diameters and more layers in the original material, the structure of the separation processing device and the process of processing the material are introduced as follows.

[0086] In the embodiment of the present utility model, the separation treatment device includes a stirrer 40, an intermediate tank 41, a centrifuge 47, a high-pressure homogenizer 50, a feed tank 49, and a first three-way valve 45. The intermediate tank 41 is provided with a stirring feed port 39, a stirring discharge port 42, a second return port 52, and a first return port 54. The stirrer 40 extends into the internal space of the intermediate tank 41. An intermediate tank control valve 43 and an intermediate tank pressure pump 44 are provided on the intermediate tank discharge pipe. The centrifuge 47 is provided with a centrifugal feed port 46, a second centrifugal discharge port 48, and a first centrifugal discharge port 53. The first centrifugal discharge port 53 is connected to the first return port 54. The high-pressure homogenizer 50 is provided with a homogenizing discharge port 51. The high-pressure homogenizer 50 is connected to the feed tank 49. The feed tank 49 is connected to the second centrifugal discharge port 48; the homogenizing discharge port 51 is connected to the second return port 52. One end of the first three-way valve 45 is connected to the stirring discharge port 42, one end is connected to the centrifugal feed port 46, and one end is connected to a stirring control valve 55; the stirring control valve 55 is arranged between the first three-way valve 45 and the first filter three-way valve 12.

[0087] Specifically, open the intermediate tank control valve 43, connect the first three-way valve 45 to the stirring discharge port 42 and the centrifugal feed port 46, and start the intermediate tank pressure pump 44 and the centrifuge 47. The centrifuge 47 separates the graphene sheets in the material from the liquid by using the sedimentation speed of graphene with different particle sizes in the material. The graphene material with a smaller sheet diameter and fewer sheet layers returns to the intermediate tank 41 from the first centrifugal discharge port 53 through the first return port 54. The graphene material with a larger sheet diameter and more sheet layers enters the feed tank 49 from the second centrifugal discharge port 48. Then, the material enters the high-pressure homogenizer 50 from the feed tank 49. Start the high-pressure homogenizer 50, and the concentrated material undergoes high-pressure homogenization treatment and flows back to the intermediate tank 41 from the homogenizing discharge port 51 through the second return port 52. After the high-pressure homogenization is completed, start the stirrer 40 to stir the material in the intermediate tank 41 evenly.

[0088] It should be emphasized that the centrifugal homogenization process here can be cycled. After being processed by the high-pressure homogenizer 50, the sheet diameter and the number of sheet layers of graphene in the material can become smaller and thinner. It can be understood that the above centrifuge 47 and high-pressure homogenizer 50 can further realize the refinement treatment of graphene sheets. The above refinement process can be cycled. The graphene in the material with a larger sheet diameter and more layers becomes smaller and thinner under the treatment of the high-pressure homogenizer 50, improving the dispersion stability of graphene in the material. Preferably, the lower part of the centrifuge 47 is designed to be cylindrical to prevent sediment formation. At this time, the centrifuge 47 concentrates the graphene in the material by centrifugal force.

[0089] When the separation treatment device finishes processing the material with a larger sheet diameter and more sheet layers in graphene, it is still necessary to continue transporting these materials to the filtering device and the sedimentation device, and finally collect them in the finished product tank 60. The specific process is as follows:

[0090] Connect the first three-way valve 45 to the intermediate tank control valve 43 and the agitation control valve 55, connect the first filtration three-way valve 12 to the agitation control valve 55 and the first filtration feed port 13, connect the second filtration three-way valve 17 to the first filtration discharge port 14 and the second filtration feed port 18, connect the third filtration three-way valve 22 to the second filtration discharge port 19 and the third filtration feed port 23, and close the first filter outlet valve 38, the second filter outlet valve 37, the third filter outlet valve 36, and the sedimentation control valve 34, and turn on the intermediate tank pressure pump 44.

[0091] At this time, the material in the intermediate tank 41 enters the first filter 15 from the first filtration feed port 13. The specific filtration process is the same as the process of filtering the above-mentioned original material. The material enters the outside of the first filter element 16 from the first filtration feed port 13, is filtered by the first filter element 16, and flows out from the first filtration discharge port 14. Then, the material enters the outside of the second filter element 21 from the second filtration feed port 18, is filtered by the second filter element 21, and flows out from the second filtration discharge port 19. Then, the material enters the outside of the third filter element 26 from the third filtration feed port 23, is filtered by the third filter element 26, and flows out from the third filtration discharge port 24. It enters the annular pipe 29 through the sedimentation feed port 28. After different layers of graphene are accelerated by the annular pipe 29, the graphene with more layers passes through the material return pipe from the outer pipe outlet of the annular pipe outlet 30 and enters the sedimentation tank 31, and the graphene with fewer layers passes through the material collection pipe from the inner pipe outlet of the annular pipe outlet 30 and enters the finished product tank 60 through the first feed port 57.

[0092] It should be noted that the process of the separation device transporting the processed material to the filtration device and the process of the blending device outputting the original material to the filtration device can be carried out synchronously.

[0093] It should be understood that the above embodiments are only used to illustrate the technical concept and features of the present invention, and its purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A sedimentation device, characterized in that: It comprises a sedimentation reaction container; the sedimentation reaction container is provided with a sedimentation feed port, a sedimentation port and a finished product discharge port, the sedimentation feed port is connected to an annular pipe arranged in the inner space of the sedimentation reaction container for inputting materials; the finished product discharge port is used for outputting dispersed materials; the end of the annular pipe has a forked structure, and the forked structure comprises a material collecting pipe and a material reflux pipe; the material collecting pipe is an extension of the inner side of the annular pipe, and is used for outputting dispersed materials; the material reflux pipe is an extension of the outer side of the annular pipe, and the other end of the material reflux pipe is connected to the sedimentation port and extends to the bottom of the sedimentation reaction container.

2. The sedimentation device according to claim 1, characterized in that: The sedimentation reaction container is a conical sedimentation tank, the sedimentation port is connected to the sedimentation return pipe, and the finished product discharge port is connected to the finished product discharge pipe; And / or, the sedimentation return pipe is provided with a sedimentation control valve and a sedimentation pressure pump; And / or, the finished product discharge pipe is provided with a discharge control valve and a discharge pressure pump.

3. A graphene dispersion device, characterized in that: include: A filtering device and a sedimentation device and a separation treatment device as claimed in claim 2; The filtering device is connected to the sedimentation device to form a first circuit for material circulation, and the filtering device is connected to the separator treatment device to form a second circuit for material circulation. The filtering device is used to filter the material, and the sedimentation device is used to sediment the filtrate output by the filtering device, and collect the upper lubricating oil after sedimentation. The separator treatment device is used to homogenize the filtrate output by the filtering device, and collect the solid matter after homogenization.

4. The graphene dispersion device according to claim 3, characterized in that: The filtering device comprises n filters, n≥2; The filter comprises a filter body and a feed pipe, a discharge pipe and a filter outlet pipe connected to the filter body; the filter body has a working chamber inside, a filter element is arranged in the working chamber, the filter element divides the working chamber into a first chamber and a second chamber, and the second chamber is arranged in the first chamber; The filter outlet pipe is connected to the first chamber; the discharge pipe is connected to the second chamber; the filter body is provided with a reversing multi-way valve, when the reversing multi-way valve is adjusted to the first flow direction, the feed pipe is connected to the first chamber, when the reversing multi-way valve is adjusted to the second flow direction, the feed pipe is connected to the second chamber; Among them, the feed pipe in the second filter is connected to the discharge pipe of the first filter, the filtration pipe of the second filter is connected to the feed pipe of the first filter, and the discharge pipe of the second filter is connected to the feed pipe of the third filter; ... the feed pipe of the mth filter is connected to the discharge pipe of the m-1th filter, the discharge pipe of the mth filter is connected to the feed pipe of the m+1th filter, and the filtration pipe in the mth filter is connected to the feed pipe of the m-1th filter; ... the feed pipe of the nth filter is connected to the discharge pipe of the n-1th filter, and the filtration pipe of the nth filter is connected to the feed pipe of the n-1th filter; The feed pipe of the first filter is used to input the material before filtration, the filtration pipe of the first filter is used to output the filtrate obtained after filtration, and the discharge pipe of the nth filter is used to output the filtered material, 2≤m≤n.

5. The graphene dispersion device according to claim 4, characterized in that: The pore size and / or porosity of the filter elements included in at least two of the n filters are different; and / or, the pore sizes of the filter elements of the n filters gradually decrease from the first filter to the nth filter; And / or, the feed pipe of the m-th filter, the discharge pipe of the m-1-th filter and the filter outlet pipe of the m+1-th filter are connected via a three-way valve.

6. The graphene dispersion device according to claim 4, characterized in that: The sedimentation return pipe is connected to the feed pipe of the nth filter; the discharge pipe of the nth filter is connected to the sedimentation device; the separator treatment device is connected with a filtration return pipe; the filtration return pipe is connected to the feed pipe of the first filter; the filtration pipe of the first filter is connected to the separator treatment device; the discharge pipe of the nth filter is connected to the annular pipe, and the sedimentation return pipe is connected to the feed pipe of the nth filter.

7. The graphene dispersing device according to claim 6, characterized in that: The separation processing device comprises a stirring assembly; the stirring assembly comprises an intermediate tank and a stirring member; the stirring member extends to the inner space of the intermediate tank; the filter pipe of the first filter is connected to the intermediate tank; the intermediate tank is provided with the filter return pipe, which is used to transfer the stirred material to the feed pipe of the first filter; And / or, the stirring member is a stirrer; And / or, the filter return pipe is provided with an intermediate tank control valve and an intermediate tank pressure pump; And / or, a valve is provided on the filter outlet pipe of the first filter.

8. The graphene dispersing device according to claim 7, characterized in that: The separation treatment device further comprises a centrifugal assembly; the centrifugal assembly is connected with a centrifugal feed pipe and a first return pipe; the centrifugal feed pipe is connected to the filter return pipe through a three-way valve; the first return pipe is connected to the intermediate tank; And / or, the centrifugal assembly is a centrifuge; And / or, the separator processing device further comprises a homogenizing component; the centrifugal component is further connected to a centrifugal discharge pipe; the centrifugal discharge pipe is connected to the homogenizing component; the homogenizing component is connected to a second return pipe; the second return pipe is connected to the intermediate tank; And / or, the homogenizing component includes a feed tank and a high-speed homogenizer; the centrifuge discharge pipe is connected to the feed tank; the feed tank is connected to the high-speed homogenizer; and the second return pipe is arranged on the high-speed homogenizer.

9. The graphene dispersing device according to claim 4, characterized in that: It also includes a pre-dispersing device, which includes a blending device and a grinding device; the blending device is connected to the grinding device to form a third loop for material circulation, the blending device is used to blend the material; the grinding device is used to grind the material; And / or, the blending device comprises a blending container; the blending container is connected with a blending feed pipe and a blending discharge pipe; the blending feed pipe is used to transport the original material to the blending container; the blending discharge pipe is connected to the feed pipe of the first filter, and is used to transport the blended material to the first filter; And / or, the blending container is a blending tank; And / or, the blending discharge pipe is provided with a blending tank control valve and a blending pressure pump; And / or, the blending tank comprises an upper and lower structure, which are connected by a narrow opening in the middle; And / or, the upper and lower sections are conical structures; And / or, a sandwich layer is provided at the narrow mouth of the blending tank; and / or, the interlayer contains a conductive liquid; And / or, the conducting liquid is heat conducting oil; And / or, the interlayer is externally connected to a mold temperature controller.

10. The graphene dispersing device according to claim 9, characterized in that: The grinding device comprises a grinding container; the grinding container is connected with a grinding feed pipe and a grinding discharge pipe; the grinding feed pipe is connected to a blending discharge pipe through a three-way valve; the grinding discharge pipe is connected to the blending container.

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